Heating and sterilizing apparatus



p 1943- s. DUBERSTEI'N ETAL 2,329,520

HEATING AND STERILIZING APPARATUS Filed July 24, 1941- 2 Sheets-Sheet 1 INVENTORS, i ii mun DuBEmsrn/v ATTO RN EY Sept, 14, 1943. s. DUBERSTEIN r AL 9,

HEATING AND STERILIZING APPARATUS H Filed July 24, 1941 2 Sheets-Sheet 2 INVENTOR Al/c/xams WE-W H IR ATTORN Patented Sept.

'" I h itosi Inc., a corporation of iN Y n Application July 24,1941 S1i N 93m 1 Claim. (01. 219 19 This invention relates to electrically heated beyond thebox, where it is provided with addi- Water baths or steam sterilizers adapted to be tional ap t s 5 117 receiverteshtllbes 6 W e employed in laboratories, doctors and dental ofnot in use. F t s P po a s P a 8 y fioes for sterilizing instruments, softening and be secured to the back of the box to support the melting plastics, heating chemicals, and the like. 5' e tubes, and alsovaspa'ced pp r p ate 9 may Such heaters usually operate onthe indirect heatbe mounted on ol ow posts l0. ris g from the ing principle, that is, hot water is employed as rearjof the plate 3. The plate 9 is shown as havthe intermediary between the instrument being, in i c p between e heads of Set heated and the source of heat, the hot water screws 12 Passing t h d D S e either heating the instrument by direct or'indiably; the screws extend downwardly through the rect contact or by the steam from the boiling top plate, and enter apertures I 3 in the back wall water. of the box I which are preferably lined with soft According to our invention, we have devised a metal so thatxthe screws may b threadedithereremovabletop or cover for such a sterilizer so Plate s p de With rt s N to that one base or container may be employed with 5 register witha f thereby p he different types of top plates to adapt the same st t b s E ect- I for avariety of uses. 7 Plate 3 may als -be' provided with a much Another object of the invention is to improve l rger aperture l5 for use with beakers or conupon top plates of such instruments, whereby tainers'larger'than test tub s. Sa dhpe t s different size containers or beakers may be acn rma lyf s d y on or m lids 0r Closures commodated. l6 and I1 pivoted to one side of theaperture by Referring to the drawings, i a common pin [8, The top lid I1 is smaller and Fig. l is a perspectiv view of our sterilizer closes the aperture [5' in the larger lid it, while with one form of top plate lifted above the same the p tu l5 se larger ut is closed y to show its construction. combined action of lids l6 and I1. This con- Fig. 2 is an end viewf th form of th i struction will be made clear by reference to Figs. vention shown i Fig 1, it th top plate in 13, 4 and'5, showing similar constructions except place and showing a test tube in the reserve rack. a in the latter s three d fi'e 'e t lids are Fig. 3 is a perspective view showing an alterp d ste d iJWO, s Sh wn in ig. As

native form of top plate, shown in Fig. 5, when all of the lids I1, l1 and I Fig. 4 is a similar view of the same, showing the 6 are'moved to an p n position, the e u rotatable lids positioned to receive a larger beaker I5 is able to receive the l'ar e tsize beaker- With than in Fig, 3. smaller beakers in use, the larger ring lid I 6 only Fig. 5 is a similar view showing a still different is closed, the ape t e Of w h is Somewhat .position of the lids or closures for a still larger smaller than the aperture I t external i-' beaker, ameter of ring l6 being of course somewhatlarger Fig. 6 shows a still further form of top plate thanfaperture 15. For beakers still smaller, the designed for a plurality of large beakers; ring lid ll" lS'CIOSBd, the aperture 11" of which The main or se p rti n of o r invention may is still smaller, while if it is desired to close enbe Similar to that Shown in 0111 o 'f v 0 tirely the aperture, all lids are closed as shown in 2,230,238, dated February 4, 1941, for Sterilizers, 1 Figs, 1 and z th right hand'side f F]' g may be provided with a downward extension or flange adapted to fit snugly within the rim of and is as a rectangular box portion 1' Each lid is shown as provided with aknob30 for constructed of porcelain or the like, with an electurning it about common pivot pin trical heating element (not sl'towm the base ,-If it is desired to use the water bath for melte i l aie i s ifg li 2: :5 $3222 5 ing or softening plastics or for dry sterilization, of a main Plate adapted to rest on and'extend top Q is removed and replaced by over the topedge 4 of the box land is provided metamc 'portlon'such as Shown m In with a plurality of apertures 5 adapted to receive a one or more test tubes 6, or the like, for heating in the hot water contained in the box I. Plate 3 or dry well-20 is provided in the top which extends downwardly below the normal water level .heated may be placed in this container and at the same time kept dry. The'container 20 is the box so as to hold the same in place. 1 I v The plate also preferably extends rearwardly shown as shorter than the box I so that one end thiscasea downwardly extending metal reservoir 2| in thewater bath. I Therefore, artiolesto be may be provided with a normally closed aperture 5 for the purposes above described.

Fig. 6 shows a still difierent form of them-- venticn having a top plate 25 provided only with large apertures l5 and I5 which may be closed at will by a plurality of lids having various size apertures, as described in connection with the preceding figuresf v Y Y As many changes could be vmade in the above construction and many apparently widely differ- I: 1. ent embodiments of this invention could be made without departing from the scope thereof, itis intended that all matter contained in the above 7 description or shown in the accompanying raw ings shall be interpreted as illustrative and no in a limiting sense.

and desire to secure by Letters Patent is 4 An indirect heater for test tubes and the like comprising a container for water, a heater therein, a cover for said container, having a plurality of apertures therein'over the container, a rearwardly extending portion on said cover also having apertures therein beyond the rear wall of the container, a plate secured to said coverin spaced relation above said extension and having apertures registering with said other apertures in said vextension, and. a rest secured to the rear of said container under said extension, whereby test ytubes "when not in use may be held vertical by the registering apertures in said cover and plate "and supported by said rest.

Having described our invention; ,what'we claim 1 f' j v SAMUEL DUBERSTEIN. NICHOLAS LAWNER. 

